Archived posting to the Leica Users Group, 1998/08/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Dear Group, I just read the following on the N_____ user group. Does anyone agree/disagree with Mr. Covington's assertion the "nice bokeh" is really uncorrected spherical aberation? Jim Licquia <<<<Date: Mon, 17 Aug 1998 09:59:42 -0400 From: "Michael A. Covington" <covington@mindspring.com> Subject: Evaluating bokeh without film You can easily evaluate the bokeh of a lens by looking at a very distant point source of light, such as a very small electric light or the sun glinting off a curved surface, and putting it out of focus. Be warned, though, that the pursuit of pleasing bokeh can easily become a Cult of Bad Lenses. Pleasing bokeh generally comes from uncorrected spherical aberration, which costs you sharpness. Michael A. Covington / AI Center / The University of Georgia http://www.ai.uga.edu/~mc http://www.mindspring.com/~covington >>>>>